• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

a 6c19p linestage

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Bigun

Bigun

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Joined 2009
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Isn’t the 6c19p equivalent to half a 6AS7 ? - many SE amps have been built with those and my own experience is that it sounds v nice, never harsh. The only tubes that I’ve ever found harsh are pentodes/tetrodes and usually higher transconductance. I don’t believe the 6c19p should sound harsh but why you are finding it to be the case I’m not sure. I think the culprit is most likely your choice of the operating point and load; suggest you try changes to this rather than swapping out parts and trying different tube types. Seems to me that it’s too early to give up for a man who’s approach is one of tinkering until he finds the right sound. For example, can you run it at higher current and lower voltage along with a smaller anode load of 2k ?
 
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